22 Cosa deve sapere il Cardiologo clinico dell'ECG neonataleA.O. S. G. MoscatiAvellinoElectrocardiographic Patterns in the ThreeCommon Forms of the Long-QT Syndrome.The LQT1 form of the long-QT syndrome is associatedwith a broad T wave without a shortening of the QTintervaldue to exercise (as shown in Fig. 1C). LQT2is associated with low-amplitude, often bifid, T waves.LQT3 is associated with a long isoelectric segment anda narrow-based, tall T wave. Although patterns maysuggest a specific genotype of the long-QT syndrome,5many variants have been described.37N Engl J Med 2008;358:

24 Cosa deve sapere il Cardiologo clinico dell'ECG neonataleA.O. S. G. MoscatiAvellinoElectrocardiographic Patterns in the ThreeCommon Forms of the Long-QT Syndrome.The LQT1 form of the long-QT syndrome is associatedwith a broad T wave without a shortening of the QTintervaldue to exercise (as shown in Fig. 1C). LQT2is associated with low-amplitude, often bifid, T waves.LQT3 is associated with a long isoelectric segment anda narrow-based, tall T wave. Although patterns maysuggest a specific genotype of the long-QT syndrome,5many variants have been described.37

25 Cosa deve sapere il Cardiologo clinico dell'ECG neonataleA.O. S. G. MoscatiAvellinoElectrocardiographic Patterns in the ThreeCommon Forms of the Long-QT Syndrome.The LQT1 form of the long-QT syndrome is associatedwith a broad T wave without a shortening of the QTintervaldue to exercise (as shown in Fig. 1C). LQT2is associated with low-amplitude, often bifid, T waves.LQT3 is associated with a long isoelectric segment anda narrow-based, tall T wave. Although patterns maysuggest a specific genotype of the long-QT syndrome,5many variants have been described.37

26 Cosa deve sapere il Cardiologo clinico dell'ECG neonataleA.O. S. G. MoscatiAvellinoElectrocardiographic Patterns in the ThreeCommon Forms of the Long-QT Syndrome.The LQT1 form of the long-QT syndrome is associatedwith a broad T wave without a shortening of the QTintervaldue to exercise (as shown in Fig. 1C). LQT2is associated with low-amplitude, often bifid, T waves.LQT3 is associated with a long isoelectric segment anda narrow-based, tall T wave. Although patterns maysuggest a specific genotype of the long-QT syndrome,5many variants have been described.37